In Canada, the price difference is CA$4,200The Sprinter 3.0 diesel was rated at 188 horsepower last year. This year, they are now calling it 190 horsepower.
Mercedes rates the M274 gas engine at up to 241 horsepower in other applications. But when offered as a $7,000 less-expensive Sprinter engine, they're now claiming that it only makes 190 horsepower.
I'm calling shenanigans- marketing shenanigans. Mercedes doesn't want to lose sales on the diesel engine that is slower, won't save you any money on fuel, and sells for $7,000 more.